For sale here is a 100-400 L lens with UW date code. Less than a year old and hardly used. Selling to fund a 16-35 lens. The IQ is amazing and it is in perfect condition! The images below show a Hoya UV filter which I originally intended to include for an additional fee but decided to keep it so it won't be included. Everything it came with is included (carrying case, tripod ring, blank warranty card, hood, box). Also includes Acratech ACQRLP2.5 2.5" Quick Release Plate for Lenses (seen here http://www.bhphotovideo.com/c/product/329095-REG/Acratech_2130_2_5_Quick_Release_Plate.html )
Here is a photo of the front element without the filter (from my inspection there only seems to be 1 or 2 specs of dust which are not a problem IQ wise. you really have to search for them; i tried capturing them in photo but it was impossible.):
